Add an Authorization header with an AWS4-HMAC-SHA256 signature to the list of headers.

Add an X-Amz-Date header with a long date value in YYMMDDTHHMMSSZ format to a list of headers.

Add an X-Amz-Security-Token if credentials configurations are configured for it

Generate an AWS4-HMAC-SHA256 authorization signature.

Strip leading and trailing whitespace around name and value, convert name to lowercase, and add a trailing newline.

Convert a list of headers to canonical header format. Leading and trailing whitespace around header names and values is stripped, header names are lowercased, and headers are newline-joined in alphabetical order (with a trailing newline).

Process and merge request values into a canonical request for AWS signature version 4.

Generate a credential scope from a short date in YYMMDD format, a region identifier and a service identifier.

Strip leading and trailing whitespace around Name and convert it to lowercase.

Convert a list of headers to canonicals signed header format. Leading and trailing whitespace around names is stripped, header names are lowercased, and header names are semicolon-joined in alphabetical order.

Generate a signing key from a secret access key, a short date in YYMMDD format, a region identifier and a service identifier.

Strip the query string from the URL, if one if present, and return the URL and query string as separate values.

Generate the text to sign from a long date in YYMMDDTHHMMSSZ format, a credential scope and a hashed canonical request.